Know separation,I really hope it's fine.
If its correctly mixed, it wont be watery. It will be VERY thin, but not to the point its splashing off of your applicator.
Wet Diamond is on the thinner side though. I prefer Powerlock instead as its much thicker and spreads better IMO. The new Pinnacle Souveran is also really thick and spreads really well. I know they say its a liquid wax, but its more like a sealant with similar durability to powerlock. Its also very bright looking with great water beading.